Red Stains Dyes and Indicators

Phenol Red, Indicator, ACROS Organics™

Chemical Name or Material: Phenol Red CAS: 143-74-8 Purity Grade: Extra Pure Molecular Formula: C19H14O5S Formula Weight: 354.38 MDL Number: MFCD00003552 Synonym: Phenolsulfonephthalein

Phenol Red, Water Soluble, Indicator, ACROS Organics™

Chemical Name or Material: Phenol Red, sodium salt CAS: 34487-61-1 Purity Grade: Pure Molecular Formula: C19H13NaO5S Formula Weight: 376.35

Sudan Red 7B, ACROS Organics™ Available on GSA/VA Contract for Federal Government customers only.

Chemical Name or Material: Sudan red 7B CAS: 6368-72-5 Molecular Formula: C24H21N5 Formula Weight: 379.45 MDL Number: MFCD00003904 Synonym: C.I. 26050

Alfa Aesar™ Cresol Red sodium salt

Chemical Name or Material: Cresol Red sodium salt CAS: 62625-29-0 Molecular Formula: C21H17NaO5S Formula Weight: 404.42 MDL Number: MFCD00001618 Synonym: o-Cresolsulfonephthalein sodium salt

Phenol Red, ACROS Organics™

Chemical Name or Material: Phenol Red Name Note: Pure CAS: 143-74-8 Purity Grade: ACS Reagent Grade Molecular Formula: C19H14O5S Formula Weight: 354.38 MDL Number: MFCD00003552 Synonym: Phenolsulfonephthalein

Methyl Red sodium salt, 0.02% w/v Aqueous Solution, Alfa Aesar™

Chemical Name or Material: Methyl Red sodium salt CAS: 845-10-3 Physical Form: Liquid Assay Percent Range: 0.02% w/v Molecular Formula: (CH3)2NC6H4N=NC6H4CO2Na Formula Weight: 291.29 MDL Number: MFCD00002426

Cresol Red Solution, 0.02% Products for Science Education

Chemical Name or Material: Cresol Red Solution, 0.02% CAS: 62625-29-0 CAS: 7732-18-5 Assay Percent Range: 0.02% w/v

Methyl Red hydrochloride, ACS reagent, ACROS Organics™

Chemical Name or Material: Methyl Red hydrochloride CAS: 63451-28-5 Purity Grade: ACS Reagent Grade Molecular Formula: C15H15N3O2·HCl Linear Formula: (CH3)2NC6H4NNC6H4COOH·HCl Formula Weight: 305.76 MDL Number: MFCD00012614 Synonym: 2-[4-(Dimethylamino)phenylazo]benzoic acid hydrochloride

Alizarin Red S, pure, certified, ACROS Organics™

Chemical Name or Material: Alizarin Red S CAS: 130-22-3 Purity Grade: Pure Molecular Formula: C14H7NaO7S Formula Weight: 342.26 MDL Number: MFCD00013049 Synonym: 9, 10-Dihydro-3, 4-dihydroxy-9

Alfa Aesar™ Ethyl Red

Chemical Name or Material: Ethyl Red CAS: 76058-33-8 Molecular Formula: C17H19N3O2 Formula Weight: 297.36 MDL Number: MFCD00002427 Beilstein: 3366056 Synonym: 2-(4-Diethylaminophenylazo)benzoic acid

Eosin B, pure, high purity, biological stain, ACROS Organics™ Available on GSA/VA Contract for Federal Government customers only.

Chemical Name or Material: Eosin B CAS: 548-24-3 Purity Grade: Pure Molecular Formula: C20H6Br2N2Na2O9 Formula Weight: 624.06 MDL Number: MFCD00005041 Synonym: 4', 5'-Dibromo-2', 7'-dinitrofluorescein

Methyl Red, ACS reagent, ACROS Organics™

Chemical Name or Material: Methyl Red Name Note: Pure CAS: 493-52-7 Purity Grade: ACS Reagent Grade Molecular Formula: C15H15N3O2 Linear Formula: (CH3)2NC6H4N=NC6H4CO2H Formula Weight: 269.3 MDL Number: MFCD00002425 Synonym: 2-[4-(Dimethylamino)phenylazo]benzoic acid

Phenolphthalein, ACS

Chemical Name or Material: Phenolphthalein CAS: 77-09-8 Name Note: For analysis ACS Purity Grade: ACS Grade Molecular Formula: C20H14O4 Formula Weight: 318.33 MDL Number: MFCD00005913 Beilstein: 284423 Merck Index: 14,7243

Alfa Aesar™ Neutral Red

Chemical Name or Material: Neutral Red CAS: 553-24-2 Molecular Formula: C15H17ClN4 Formula Weight: 288.78 MDL Number: MFCD00012651 Beilstein: 3918740 Merck Index: 14,6488 Synonym: Basic Red 5; C.I. 50040

Eosin Y, pure, high purity, biological stain, ACROS Organics™

Chemical Name or Material: Eosin Y Name Note: High purity biological stain CAS: 17372-87-1 Purity Grade: Pure Molecular Formula: C20H6Br4Na2O5 Formula Weight: 691.85 MDL Number: MFCD00005040 Synonym: 2', 4', 5'

Methyl Red, sodium salt, indicator, pure, ACROS Organics™

Chemical Name or Material: Methyl Red, sodium salt Name Note: pure CAS: 845-10-3 Purity Grade: Extra Pure Molecular Formula: C15H14N3NaO2 Linear Formula: (CH3)2NC6H4N=NC6H4CO2Na Formula Weight: 291.27 MDL Number: MFCD00002426 Synonym: 2-[4-(Dimethylamino)phenylazo]benzoic acid, sodium salt

Alfa Aesar™ Auramine O, 80% dye content

Chemical Name or Material: Auramine O CAS: 2465-27-2 Name Note: 80% dye content Molecular Formula: C17H21N3·HCl Formula Weight: 303.84 MDL Number: MFCD00012484 UN Number: UN2811 Beilstein: 4030061 Synonym: C.I. 41000

Erythrosin B, pure, high purity, biological stain, ACROS Organics™

Chemical Name or Material: Erythrosin B CAS: 16423-68-0 Purity Grade: Pure Molecular Formula: C20H6I4Na2O5 Formula Weight: 879.85 MDL Number: MFCD00144257 Synonym: Acid Red 51

Alfa Aesar™ Neutral Red, ACS

Chemical Name or Material: Neutral Red CAS: 553-24-2 Purity Grade: ACS Grade Molecular Formula: C15H17ClN4 Formula Weight: 288.78 MDL Number: MFCD00012651 Beilstein: 3918740 Merck Index: 14,6488 Synonym: Basic Red 5; C.I. 50040

Chlorophenol Red, Water Soluble, ACROS Organics™

Chemical Name or Material: Chlorophenol Red, sodium salt CAS: 123333-64-2 Purity Grade: Pure Molecular Formula: C19H11Cl2NaO5S Formula Weight: 445.25 Synonym: 3', 3''-Dichlorophenolsulfonephthalein, sodium salt

Alizarin Red S, FSE Products for Science Education

Chemical Name or Material: Alizarin Red S CAS: 130-22-3 Molecular Formula: C14H7NaO7S Linear Formula: C14H7NaO7S Formula Weight: 342.26 Synonym: Mordant Red 3

Alfa Aesar™ Methyl Red sodium salt

Chemical Name or Material: Methyl Red sodium salt CAS: 845-10-3 Molecular Formula: C15H14N3NaO2 Formula Weight: 291.29 MDL Number: MFCD00002426 Beilstein: 4065488 Synonym: C.I. 13020; Methyl Red, water soluble

Alfa Aesar™ Biebrich Scarlet sodium salt

Chemical Name or Material: Biebrich Scarlet sodium salt CAS: 4196-99-0 Molecular Formula: C22H14N4Na2O7S2 Formula Weight: 556.49 MDL Number: MFCD00003891 Beilstein: 3883900 Synonym: C.I. 26905; Acid Red 66

Phenol Red Indicator, ACS Grade Products for Science Education

Chemical Name or Material: Phenol Red Indicator CAS: 34487-61-1 Assay Percent Range: 97 to 100% Linear Formula: C19H13NaO5S Formula Weight: 376.36 Synonym: Phenolsulfonephthalein Sodium

MethyleRed, 0.02% W/v Solution in Methanol, ACROS Organics™

Chemical Name or Material: MethyleRed CAS: 845-10-3 Molecular Formula: C15H14N3NaO2 Linear Formula: (CH3)2NC6H4N=NC6H4CO2Na Formula Weight: 291.29 MDL Number: MFCD00002426 Synonym: 2-[4-(Dimethylamino)phenylazo]benzoic acid, sodium salt

Alfa Aesar™ Congo Red, indicator grade

Chemical Name or Material: Congo Red CAS: 573-58-0 Purity Grade: Indicator Grade Molecular Formula: C32H22N6Na2O6S2 Formula Weight: 696.67 MDL Number: MFCD00004028 Beilstein: 3894858 Merck Index: 14,2498 Synonym: C.I. 22120

Eosin Y, pure, certified, ACROS Organics™

Chemical Name or Material: Eosin Y CAS: 17372-87-1 Purity Grade: Pure Molecular Formula: C20H6Br4Na2O5 Formula Weight: 691.85 MDL Number: MFCD00005040 Synonym: 2', 4', 5'

Cresol Red, Indicator Grade, Pure, ACROS Organics™

Chemical Name or Material: Cresol Red CAS: 1733-12-6 Purity Grade: Pure Molecular Formula: C21H18O5S Formula Weight: 382.42 MDL Number: MFCD00005878

Alfa Aesar™ Sudan IV

Chemical Name or Material: Sudan IV CAS: 85-83-6 Molecular Formula: C24H20N4O Formula Weight: 380.45 MDL Number: MFCD00003893 Merck Index: 14,8393 Synonym: C.I. 26105; Scarlet Red

Quinaldine red, pure, ACROS Organics™

Chemical Name or Material: Quinaldine red Name Note: Pure CAS: 117-92-0 Purity Grade: Pure Molecular Formula: C21H23IN2 Formula Weight: 430.32 MDL Number: MFCD00011968 Synonym: 2-[4-(Dimethylamino)styryl]-1-ethylquinolinium iodide

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